Transmission-gear mechanism.



PATENTED- JAN. 27, 1903.

R. B. HAIN. TRANSMISSION GEAR MECHANISM.

APPLICATION FILED JULY 30, 1902.

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PATENTED JAN. 27., 1903.

R. B. HAIN. TRANSMISSION GEAR MECHANISM.

APPLICATION FILED JULY 30, 1902.

2 SHEETS-SHEET 2.

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INVENTOH RIB M BY MMJZQ ATTORNEYS.

WITNESSES:

Miran stars RALPH BENTON HAIN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR 'IOAUTO VEHICLE COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OFCALIFORNIA.

TRANSMISSION-GEAR MECHANISM.

SPECIFICATION formingpart of Letters Patent No. 719,327, dated January27, 1903.

Application filed July 30, 1902.

- 0J5; whom, it nmy concern.-

jacent the pinion E, loosely mounted on the Be it known that I, RALPHBENTON IIAIN, l shaft E,isabrake-drum J,provided with an inresiding atLos Angeles. in the county of Los Angeles and State of California, haveinvented certain new and useful Improvements in Transmission-GearMechanisms, of which the following is a specification.

My invention, which relates generally to improvements intransmission-gearing, more l0 specifically seeks to provide an improvedtype of sun-and-planet gear mechanism of a simple and stapleconstruction in which the several parts are cooperatively arranged,whereby the power can be conveniently, l5 quickly, and positivelyshifted for producing variable-speed motion without jarring or unduestrain on the operating parts.

Myinvention com prehends a novel arrangement of a pair ofbrake-controlled drums mounted on a single shaft, direct gearconnections joining one of the said drums with the shaft and indirectgear connections joining the other drum with the shaft, a drivesprocketequipped drum carrying differential diameter-gears coacting with the twodrums, adapted under one adjustment of the entire mechanism to effect adirect connection between one drum and the shaft and under anotheradjustment an indirect connection with the other drum and shaft and adrive-sprocket connected with the gear-carrying arm.

In its more subordinate nature my invention comprises certain details ofconstruction and peculiar combination of parts, all of which willhereinafter be fullyexplained, and specifically pointed out in theappended claims, reference being bad to the accompanying drawings, inwhich- Figure 1 is a vertical longitudinal section of my improvedtransmission-gear mechanism. Fig. 2 is a transverse section thereof onthe line 2 2 of Fig. 1. Fig. 3 is a diagrammatic perspective viewillustrating the position of the several gears that join theinternally-geared drum and the axially-equipped gear-drum. Fig. a is asection of a slightlymodified form of my invention.

In its practical construction my invention comprises a main shaft E,provided with an integral or fixedly-connected pinion E. Ad-

ternal or orbit gear D, with which meshes the large pinion Con the shortshaft 0 and which also meshes with the pinion E,as clearly shown in Fig.1, by reference to which it will be observed at a suitable distance inadvance of the gear D is disposed a second brake-drum I, which isloosely journaled on the long hub G, keyed to anotherdrum A, locatedbetween the drums J and I and in which the shafts C are journaled andare held to loosely rotate in the bushings or bearing-sleeves B B,detachably mounted on the said drum A.

The hub GcarriesasprocketI-I, from which power is transmitted to thedrive-axle or vehicle-wheels, it being understood that a gear can besubstituted for the sprocket fortransmitting the power, if desired. Thecentral drum A is formed with an annular flange a, to which is fixedlyconnected a sprocketwheel H, which is utilized for transmitting ahigh-speed motion to the driving-axle or the vehicle-wheel and also forcentrally locating the high-speed drive-chain.

In the construction of mechanism described and shown the long hub G withthe drum A, together with the brake-drum J, are mounted to freely rotatearound the main shaft E, and the brake-drum I is freely rotatable aroundthe sleeve or hub G.

K and L designate the brake-bands for cooperating with the drumsJandI,respectively, and which may be arranged in any well'known or approvedmanner. In my complete mechanism I prefer to utilize thealternately-operatable brake-band devices disclosed in my Patent No.715,060, dated December 2, 1902.

The shaft E is provided with a central oilreservoir 6, having laterals ea which lead to the several bearings, and one of said laterals ecommunicates with the hollow of the drum A, which in practice can beutilized as an oil-reservoir and provided with a suitablypluggedfeed-opening, (not shown,) it being understood that when the drum A isthus utilized the end of shaft E would be permanently plugged to preventescape of the lubricant.

Instead of keying the hub G to the drum A, [00

as shown in Fig. 1, it may be an integral part of the said hub, as shownin Fig. 4, and the bushings B are split, so they can be readily placedon the shaft and the said shaft, with the bushings, fitted in the boredholes in the drum A. While four shafts O, with gears 0' C are shown inthe drawings, it is manifest a less number of said shafts and gears maybe used to effect a desired operation of the mechanism, (three beingpreferable.)

From the foregoing, taken in connection with the drawings, it isbelieved the complete arrangement, the simple manner in which themechanism is capable of being shifted, and its advantages will readilyappear to those skilled in the art to which it appertains.

Briefly stated, the operation is as follows: Assuming the brake K to beapplied to the drum J to hold the same from rotation, the movement ofthe shaft E through the pinion E rotates the pinions C and carries themaround the orbit-gear D, and thereby imparts motion to the drum A, itbeing understood that the shafts C at this time revolve in theirbearings carried by the drum A, as it, together with the hub G, duringthe said adjustment of parts, will now travel in the same direction ofrotation of the main shaft, but at a slower speed. When the brake K isreleased and the brake L applied, the drum I, with the main shaft E,running as before, the motion of the drum J is reversed, which nowreceives a direct power from pinion 0, gear 0, and the internal gear D.This action of the gear 0 causes the small gear 0 to rotate around thegear F on the brake-drum I in an opposite direction to the main shaft E,and thereby produces a reverse motion of the drum A, the sleeve G, andthe sprockets H H at aspeed slower than that of the main shaft E. Whenboth brakes K and L are released from theirrespective drums, the mainshaft E is free to rotate,while the gear 0, with the drum A, its sleeveG, and the sprockets H H" are at a standstill, while the brake-drums Jand I revolve in opposite directions to each other. Now when in thisposition by applying the friction-clutch devices (designated by M inFig. 1) or any other suitable locking means for joining the shaft E andbrake-drum J, the entire mechanism will be locked, and the drums J andI, pinions O C, drum A, with its hub G, together with the sprockets H1-1, will all revolve with and at the same speed of the the shaft E.

Slight changes in the details and modifications of the parts shown anddescribed may be made without departing from my invention as defined bythe appended claims.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a transmission-gear mechanism of the character described, thecombination with the main drive-shaft, a pinion fixedly held thereon, acentral drum loosely mounted on said drive-shaft, and having alaterally-extending hub, a pair of drums J and I disposed one at eachside of the central drum, the drum J being loosely mounted on thedrive-axle, the drum 1 being loosely mounted on the hub of the centraldrum A, a sprocket-pinion on said hub, a sprocket-rim on the body of thedrum A, brake devices cooperating with the drums I and J, the centraldrum having a number of transverse journal-bearings, a shaft in each ofsaid bearings, a large gear on one end of the shafts, a small gear onthe other end, and held to mesh with the pinion on the driveshaft, thedrum J having an internal annular gear-rim, held to mesh with the largegear on the shaft mounted in the central drum, an axial gear on the drumheld to mesh with the small gears on the central drum supportedtransverse shafts, all being arranged substantially as shown anddescribed.

2. A transmission-gear of the character described, comprising thecombination with the shaft E and the pinion E fixedly held thereon; of acentrally-disposed drum, an annular sprocket-rim mounted on the saiddrum, a laterally-extending hub projected from the central drum, asprocket-gear mounted on said hub, said hub being loosely mounted on themain shaft E, the drum J loosely mounted on the main shaft, a brakedevice cooperating therewith, said drum J being disposed at one side ofthe central drum and having an internal annular gear-rim, a series ofgears 0 carried by the central drum axially rotatable and revolublearound the main shaft, said gears meshing with the internal gear-rim onthe drum J, a second series of small gears C connected with androtatable with the gears O, a third drum I loosely mounted on the hub ofthe central drum, an axial gear on the said third drum held to mesh withthe gears O and the clutch mechanism M, all being arranged substantiallyas shown and for the purposes described.

, RALPH BENTON HAIN.

Witnesses: I

CARROLL S. HARTMAN, GRACE NIoHoLsoN.

